Samsung 40" LED TV backlight issue

Stb75

Joined Dec 27, 2016
3
Hi,

I think even w/o D1/D2/D3 those led will lit on. Not like in the any inductor coil (relay) needs it .
very rare to experience a reverse voltage happened due to the supply is at dc level.

And also D3 is not a zener if the schematic is D3 label see the cathode ( / ) not like (z )look like.

Thanks for the video clips it seem good to me.
OK I will it without D1/@2 and see if it works
 

Stb75

Joined Dec 27, 2016
3
Pulled the D2 and both of them work !
Hopefully none other the other LED go!
They must be over driving them for them to fail like that.. I'll look for a firmware update and in the interim run the back light at a lower level.

Thanks!
 
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